The Determinants of Sub-Saharan Africa's (SSA) Bilateral Trade with the North: A Gravity Model Approach
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Date
2009-06
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A.A.U
Abstract
This paper attempts to assess the determinants of SSA 's bilateral trade with the North . In this
regard, an a ugment ed gravity model has been specifi ed to annual imports of SSA cOllnt ries
from the industrial countri es. The model is tested for a sample of 35 countries. 27 SSA and 8
industrial countri es over the period 1995-2007. In the model, the bil ateral import is a linear
fun c tion of economic s ize, popu lation of the country, per capita income and geograph ical
diffe rence and hi stori cal dummies. Specifically, SSA bilateral import is pos iti ve ly determined
by the s ize of econo mies (GOP of the importing and exporting country), lin guist ic and
hi stori ca l ties. Infras tru cture indexes which are augmented as a proxy for public infrastruc tu res
have a lso a positive influence. On th e other hand, transportation cost proxied by geogra ph ical
di stance and country's access to sea are found to have a negati ve influence on SSA bila teral
import . Likewise, the coeffici ent of per capita GOP differential between these countries has a
negati ve s ign indi cating that the Linder e ffect dominates the H-O hypothesis in the case of
north - SSA trade fl ows.
The impli ca tion of these res ul ts is that all kinds of barriers to trade must be li berali zed to a
greater ex ten t to e nh ance SSA's bi lateral trade. Since one of the main probl ems of Sub
Saharan African trade is transport infrastructure network, improvement in infrast ructure may
be a pre- req ui site for successful trade fl ows. A further study is a lso advised to investi gate
manufac tu ring and non-manufacturing trade flows separate ly since they have di ffe rent tre nd s.
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Keywords
Sub-Saharan Africa's, Gravity Model